If you already have a QBO account you can use your username and password to join as a developer. If you are a developer desiring a test account then email Intuit @ [email protected] and request a developer subscription to QBO.

Create a new app.

Select 'Quickbooks API'.Fill in the form like in this figure and "Save". Note: the minimulcasts.io is provided because a real domain is needed to get past the validations.Next, your app tokens and keys are generated.